[Core] Do not check block if it's not the one needed
[Core] Do not check block if it's not the one needed

also there's no need to count mints and spends here

Mrs-X/Darknet,PIVX-Project/PIVX,Mrs-X/Darknet,PIVX-Project/PIVX,Darknet-Crypto/Darknet,Darknet-Crypto/Darknet,PIVX-Project/PIVX,Mrs-X/Darknet,Mrs-X/PIVX,Mrs-X/PIVX,Mrs-X/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,Mrs-X/Darknet,Mrs-X/PIVX,Darknet-Crypto/Darknet,Darknet-Crypto/Darknet,Mrs-X/PIVX,Mrs-X/Darknet,Mrs-X/Darknet,Mrs-X/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,Darknet-Crypto/Darknet,Darknet-Crypto/Darknet